Lighting device



FIG. 1 is a front perspective view of a lighting device showing the design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof.

FIG. 6 is a rear view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

Any broken line(s) shown are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a lighting device, as shown and described. 